My Bike is the Most Efficient

[Deleted member 4366]

When I charged the 2 year old (4000 miles) 400wh battery, the LCD showed 554.7 miles on the trip meter. The next time I charged it, it showed 720.0. That's 165.3 miles on one charge - approx 2.4 wh/mile. The meter had just gone down from 2 to 1 bar on the battery display, so I would probably have been good for another 30 miles or so.

I'm 100kg and all my journeys are very hilly. I encounter a 30% incline on most journeys. A couple of the journeys were over 40 miles, but most around 25 miles. Here's the bike:

 

[Artstu]

must be magic

 

[flecc]

You really must remember to switch it on when setting off.
.

 

[Deleted member 4366]

If I didn't switch it on, it wouldn't record the miles on the display!

 

[trex]

your strong legs keep the bike at over its max speed limit setting most of the time.

 

[EddiePJ]

must be magic

It would need to be with that saddle angle.



.

 

[bazwaldo]

That's a great distance, fabulous conversion as well d8veh.

 

[danielrlee]

Out of interest d8, if you could only have one of your bike builds, which would it be and why?

 

[trex]

if you could only have one of your bike builds, which would it be and why?

that could be a subject of a new thread.

 

[Deleted member 4366]

Out of interest d8, if you could only have one of your bike builds, which would it be and why?

Very good question. I have about 10 ebikes and two roadbikes. I use the roadbikes for exercise and this electric bike for everything else.

Since I build this one, it's the only electric bike I use. It's comfortable, light and efficient, and when required, it can handle very steep hills without pedalling. 30% inclines are a breeze. Since I built it, the only maintenance required, other than a squirt of oil on the chain occasionally, was a broken gear cable. I bought the gears used from Ebay, so that cable could have been very old. In fact every part of it was from Ebay, used, except the cranks, chain, tyres and electrical stuff. Total cost was about £1100 IIRC. It's done 4000 miles so far.

The only problem with it is that since I built it, I can't find anything better, so it's stopped me from building new bikes. I used to build about 4 bikes a year to try out all the new motors and stuff. Now I only build them for other people.

 

[Deleted member 4366]

That's a great distance, fabulous conversion as well d8veh.

Time to update us on what's happened with your Bearprint!

 

[bazwaldo]

Hello d8veh,
I'm pleased to see you are still building amazing bespoke Ebikes.
I've not looked in much on the forum lately.
After completing 26,500 commuting miles on the Bearprint - more than the circumference of the earth - in October 2015 I bought a Xingyue XY150XK Vogue scooter to use travelling to work.
It has a roof and windscreen so is more weather proof.



I figured after 5+ years I have nothing to prove regarding my Ebike usage.
The only trouble is my workplace closed down at the end of March this year and I have been out of work since then.
With the redundancy package I decided to take some time off after working for the last 30+ years.
I replaced the crappy Clarks disk brakes on the Bearprint my bike shop fitted with Avid BB7's which are far superior.
For a generic chinese Ebike the Bearprint overall has done a great job for me and I have thoroughly enjoyed being an Ebiker.
It's nice to post here again.
As usual best wishes to all!

Barry Webber.

 

[Deleted member 4366]

That's awsome!

 

[Eaglerider]

Hi Bazwaldo, long time no see. Amazing mileage on your Bearprint, I do wonder if you have the record. You are a beacon of ebiking to which we all should aspire. How many batteries have you got through? I'm currently needing a re-cell on my Eagle. I guess your experience suggests there is plenty of life left in my bike, it's only done 6700 miles, so perhaps I'll do some fettling to bring it back to scratch.

Alternatively, I could ask D8Veh how much he wants to build me a Rocky Mountain Beasty!

 

[flecc]

in October 2015 I bought a Xingyue XY150XK Vogue scooter to use travelling to work.
It has a roof and windscreen so is more weather proof.

That looks great Barry, and with 150cc much more practical than Honda's earlier very underpowered 50cc equivalent. Though ironically the Xingyue has a Honda engine!
.

 

[anotherkiwi]

Today's ride 7.58 Wh... That is 1 Wh better than the other day! Oh and 1259 m elevation gain over 61.54 km...

I would have to come and test on your route d8veh in order to compare bike efficiency. Mine is heavier that yours!

 

[Deleted member 4366]

Before this thread drags on too far, and before everybody rushes out to buy a Xiongda motor, I'd like to malke a couple of points:

The 165 miles range is genuine, and was done with the bike switched on all the time. Anyone could do the same as long as you have at least 2 chainrings. Instead of using the motor to power up hills, I used a low gear and low power. That means going a lot slower. I'm fairly fit (legwise) so I'm able to pedal fairly hard. Most of the time, I can travel on level zero because there's no drag from the motor. I sometimes do 30 miles before I leave level zero.

I made this thread to show the ludicrousness of any claims made about range. Range depends on the rider and their rides, not the bike. Obviously, the bigger the battery, the further you go.

I ride with my friend and forum member Saneagle. His bikeweighs about 30kg, It's got a 27Ah battery that weighs 9kg plus a 4 kg Bafang BPM motor. On an average ride of 20 to 40 miles, he uses about 100Wh, which gives him an average range of 291 miles. When his wife uses the bike, the range would be about 50 miles.

 

[EddiePJ]

I made this thread to show the ludicrousness of any claims made about range. Range depends on the rider and their rides, not the bike. Obviously, the bigger the battery, the further you go.

Exactly.

My average ride stats for riding off road work something like this.

I almost flattened the first 500wh battery on the Bosch CX powered bike in just 9 miles during the following ride, and I hadn't realised just how hot that a battery could get. Changing battery to complete the last 1.4 miles was an annoyance. https://www.strava.com/activities/658404106

Riding locally on my own on say the South downs, I would guesstimate that I get an average of 22 miles from one charge. This is an average taken from both bikes running the CX motor and 500wh batteries.

Riding to and from work off road, or with others who are on pedal only mtb's, I would guess that my average miles from one charge might if lucky hit the late thirties.

I am convinced that CX motor is nowhere as frugal on battery consumption that the Performance Line motor was. With both bikes now running CX motors and 500wh batteries, I sadly can't make any direct comparison.

 

[Deleted member 4366]

I almost flattened the first 500wh battery on the Bosch CX powered bike in just 9 miles during the following ride, and I hadn't realised just how hot that a battery could get.

That's handy for winter riding. It sort of puts the kibosh on those that say a battery loses performance in the winter.

 

[KeithMac]

I average about 4wh/mile on the Gtech, proved it's worth again today riding into a hellish head wind..